{"product_id":"6840-4065-6-1-small-block-mopar-hemi-gen-iii-fx-series-1-5cc-flat-top-gen-iii-hemi-forged-piston-set-4-065-inch-bore-pin-dia-0-927-comp-height-1-21","title":"DSS Racing Gen III Hemi FX Series Forged Piston Set 4.065\" Bore: Fits most Hemi Models","description":"\u003ch3\u003eDSS Racing FX Series Forged Piston Set\u003c\/h3\u003e\u003cp\u003eFits Chrysler, Dodge, Jeep, Ram 6.1L SRT8 Models\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e1-6840-4065D \/ 2-6840-4065D \/ 3-6840-4065D \/ K1-6840-4065D \/ K2-6840-4065D \/ K3-6840-4065D\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe DSS Racing Gen III Hemi FX Series Forged Piston Set is engineered specifically for the 6.1L SRT8 engines found in Chrysler, Dodge, Jeep, and Ram vehicles. Designed to meet the demands of high-performance applications, these pistons offer exceptional strength and durability while maintaining optimal weight for improved engine response. Whether you're rebuilding or upgrading your small block Mopar Hemi, this piston set delivers reliable performance and precision fitment.\u003c\/p\u003e\u003cp\u003eIdeal for enthusiasts and professional builders alike, these pistons provide a solid foundation for increased power output and engine longevity. Their forged construction ensures they can withstand the rigors of boosted or naturally aspirated setups without compromising reliability.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBuilt with advanced engineering and precision manufacturing, the DSS Racing FX Series pistons include the following key features:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with 4.065\" bore size for most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines\u003c\/li\u003e\n\u003cli\u003eForged construction for superior strength and durability under high stress\u003c\/li\u003e\n\u003cli\u003eFlat top design with -1.5cc volume for optimized combustion chamber dynamics\u003c\/li\u003e\n\u003cli\u003eComp height of 1.21\" for precise piston-to-deck clearance\u003c\/li\u003e\n\u003cli\u003e.927\" wrist pin diameter with options for full-floating or press-fit installation\u003c\/li\u003e\n\u003cli\u003eRing groove dimensions of 1.2mm\/1.2mm\/3mm to accommodate high-performance piston rings\u003c\/li\u003e\n\u003cli\u003eDesigned for a 3.578\" stroke and 6.243\" connecting rod length, matching factory specifications\u003c\/li\u003e\n\u003cli\u003eAvailable in multiple compression ratios: 65cc (11.06:1), 74cc (9.99:1), and 85cc (8.95:1)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eEach piston in the DSS Racing FX Series is forged from high-grade aluminum alloy, providing an excellent balance of strength and lightweight properties. The forging process enhances the grain structure of the metal, resulting in pistons that resist cracking, scuffing, and thermal fatigue even under extreme operating conditions.\u003c\/p\u003e\u003cp\u003eThe flat top design with a slight dish volume (-1.5cc) optimizes combustion efficiency and helps control detonation in high-compression setups. Precision machining ensures tight tolerances for piston-to-cylinder wall clearance and ring groove dimensions, promoting consistent sealing and reduced blow-by.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis piston set is designed as a direct fit for most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines equipped with a 4.065\" bore. Installation requires standard engine rebuild procedures, including proper honing and cleaning of the cylinder bores. The wrist pins can be installed as either full-floating or press-fit, depending on your build preference and hardware availability.\u003c\/p\u003e\u003cp\u003eDue to the precise engineering and OEM-compatible dimensions, no additional modifications are typically necessary, making these pistons an excellent choice for both performance upgrades and reliable rebuilds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSet of forged pistons sized for 4.065\" bore\u003c\/li\u003e\n\u003cli\u003eWrist pins (.927\" diameter) compatible with full-floating or press-fit installation\u003c\/li\u003e\n\u003cli\u003eDetailed specifications for compression ratios and piston dimensions\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis piston set is ideal for performance enthusiasts, engine builders, and racers seeking a durable and reliable upgrade for their 6.1L SRT8 Hemi engines. Whether you are building a naturally aspirated street machine or a boosted race engine, these pistons provide the strength and precision needed to handle increased power levels while maintaining engine longevity.\u003c\/p\u003e","brand":"DSS Racing","offers":[{"title":"FX-1 4032 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381016117460,"sku":"1-6840-4065D","price":689.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381016150228,"sku":"2-6840-4065D","price":719.95,"currency_code":"USD","in_stock":true},{"title":"FX-3 2618 Alloy with Lateral Gas Ports - XR .225 Wall Pin Upgrade - Spiro Locs \/ Pistons - Pins and Locs Without Rings","offer_id":47381016182996,"sku":"3-6840-4065D","price":899.95,"currency_code":"USD","in_stock":true},{"title":"FX-1 4032 Alloy \/ Pistons - Pins - Locs With DSS Racing Rings in a Kit","offer_id":47381016215764,"sku":"K1-6840-4065D","price":867.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins - Locs With DSS Racing Rings in a Kit","offer_id":47381016248532,"sku":"K2-6840-4065D","price":897.95,"currency_code":"USD","in_stock":true},{"title":"FX-3 2618 Alloy with Lateral Gas Ports - XR .225 Wall Pin Upgrade - Spiro Locs \/ Pistons - Pins - Locs With DSS Racing Rings in a Kit","offer_id":47381016281300,"sku":"K3-6840-4065D","price":1087.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/0002067_4_1cf1bdb9-3cb4-44fb-acde-3319f7bf5685.webp?v=1771667002","url":"https:\/\/fasthemis.com\/products\/6840-4065-6-1-small-block-mopar-hemi-gen-iii-fx-series-1-5cc-flat-top-gen-iii-hemi-forged-piston-set-4-065-inch-bore-pin-dia-0-927-comp-height-1-21","provider":"FastHemis","version":"1.0","type":"link"}